Who used to make rattraps?
The correct answer is option 'D' - Peddler.

Explanation:
Rattraps were typically made by a peddler. Let's discuss each option to understand why the correct answer is the peddler.

Crofter:
A crofter refers to a person who rents or owns a small plot of land and engages in subsistence farming. They primarily focus on cultivating crops or raising livestock. Crofters are not typically associated with the production of rattraps.

Edla:
Edla is not a profession or occupation. It is most likely a name, so it does not fit the context of the question.

Ironmaster:
An ironmaster is a person who operates or owns an ironworks, which is a facility where iron is produced or processed. Ironmasters specialize in the production of iron and iron-related products, not rattraps.

Peddler:
A peddler is an individual who travels from place to place selling goods or merchandise. Peddlers often carry their products with them and sell them directly to customers. Rattraps can be considered one of the many items that a peddler might sell to earn a living.

In conclusion, the correct answer is the peddler (option 'D') because they are the individuals who used to make and sell rattraps as a part of their business.